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. 2007 May 22;104(31):12616–12621. doi: 10.1073/pnas.0610677104

Fig. 1.

Fig. 1.

Near-IR-emitting Ag nanoclusters. (A) Schematic of the IR-emitting C12–Agn formation. After complexation of C12 DNA with silver cations, the mixture is reduced with NaBH4 and the near-IR-emitting Ag nanocluster is studied. (B) Normalized excitation and emission spectra of the studied species. (C) Image of single IR-emitting C12–Agn molecules in a poly(vinyl alcohol) (PVA) film. (D) Image of single Cy5.29 molecules in a PVA film. The image dimensions are 40 × 40 μm, and imaging conditions of C and D are identical (Hg-lamp excitation through a 640- to 660-nm bandpass filter at ≈5W/cm2 and detected with identical settings on an Andor iXon CCD).